Listen to Piano Concerto No. 1, Op. 23: I. Allegro non troppo online. Piano Concerto No. 1, Op. 23: I. Allegro non troppo is an Instrumental language song and is sung by Elena Gilels, Evgeny Svetlanov and Ussr State Symphony Orchestra. Piano Concerto No. 1, Op. 23: I. Allegro non troppo, from the album Concert of the State Academic Symphony Orchestra Conducted by Evgeny Svetlanov on February 20, 1968 (Live), was released in the year 2015. The duration of the song is 20:54. Download Instrumental songs online from JioSaavn.